Le green turtle
Now most people think Cuckio is just ``Cuck'' placed in front of Mario because he's Mario's meme. But they're wrong. Cuckio is an even more intricate pun, Cuckold + Mario = Cuckio.
Cuckold means BLACKED or inferior, a man whose wife fornicates with other men outside of the marital bond. It's not just `cuck' Mario, it's cuckold Mario, wittol Mario, candaulist Mario etc. He's Mario, but NTR. He's like if your dad got back from a trip to Japan and bought you one of those ``Super Bros'' games you love so much, and instead of there being a red-capped moustached plumber there was a fat, pink nosed cuck on an obvious bootleg.